8LSA55.EB045D000-3 by B & R Automation

B & R Automation manufactures the 8LSA55.EB045D000-3 synchronous motor as part of the 8LS Synchronous Motors series. The 8LSA suffix indicates the standard build without a reinforced bearing, which suits applications that favor low inertia over high radial load capacity. This three-phase motor serves as a torque source in industrial automation and pairs with B & R servo drives to move gantries, indexing tables, and packaging axes under closed-loop control. By delivering electronically commutated rotation rather than relying on induction slip, the motor provides predictable speed, position, and dynamic response for coordinated machine motion.

The mechanical interface uses a mounting flange with a square outer edge of 142 mm, and the rotor stack follows Length code 5, which places the motor in a medium frame for mid-power duties. Power and feedback cabling exits through an angled swivel outlet and terminates on a rugged connector, a layout that reduces flex stress in drag-chain routing. Under rated conditions, the rotor reaches 4500 rpm, providing suitable peripheral speed for high-cycle processes. An absolute encoder provides a resolution of 19/12 bits, giving the controller fine position data for precise velocity control.

Heat is removed by self-cooling through free air circulation, eliminating the need for external blowers or liquid circuits. Motion is transmitted through a smooth shaft, allowing backlash-free clamp couplings where keyed interfaces are not desirable. The inductive EnDat encoder operates on the EnDat 2.1 protocol and stores absolute position information across Multi-turn 4096 revs, enabling position recovery after power loss. The motor is supplied without a holding brake and without an oil seal, which helps reduce rotational inertia and service points. Product revision 3 records incremental design updates approved by B & R Automation.